netdev - Re: [PATCH net-next] compat: always include linux/compat.h from net/compat.h

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Date:   Sat, 21 Nov 2020 10:40:59 -0800
From:   Jakub Kicinski <kuba@...nel.org>
To:     davem@...emloft.net
Cc:     netdev@...r.kernel.org, hch@....de, arnd@...db.de
Subject: Re: [PATCH net-next] compat: always include linux/compat.h from
 net/compat.h

On Sat, 21 Nov 2020 09:52:24 -0800 Jakub Kicinski wrote:
> In file included from net/ipv4/netfilter/arp_tables.c:26:
> include/net/compat.h:57:23: error: conflicting types for ‘uintptr_t’
>  #define compat_uptr_t uintptr_t
>                        ^~~~~~~~~
> include/asm-generic/compat.h:22:13: note: in expansion of macro ‘compat_uptr_t’
>  typedef u32 compat_uptr_t;
>              ^~~~~~~~~~~~~
> In file included from include/linux/limits.h:6,
>                  from include/linux/kernel.h:7,
>                  from net/ipv4/netfilter/arp_tables.c:14:
> include/linux/types.h:37:24: note: previous declaration of ‘uintptr_t’ was here
>  typedef unsigned long  uintptr_t;
>                         ^~~~~~~~~

Ah, damn it, I obviously copied the wrong error into the commit
message. This is the correct one (after removing include of ethtool.h
from netdevice.h):


In file included from ../net/ipv4/netfilter/arp_tables.c:26:
include/net/compat.h:60:40: error: unknown type name ‘compat_uptr_t’; did you mean ‘compat_ptr_ioctl’?
    struct sockaddr __user **save_addr, compat_uptr_t *ptr,
                                        ^~~~~~~~~~~~~
                                        compat_ptr_ioctl
include/net/compat.h:61:4: error: unknown type name ‘compat_size_t’; did you mean ‘compat_sigset_t’?
    compat_size_t *len);
    ^~~~~~~~~~~~~
    compat_sigset_t